Ankle zone immobilizer



FIG. 1 is a perspective view illustrating the top front and a first side of my new design for an ankle immobilizer;

FIG. 2 is a perspective view illustrating a second side and the rear thereof;

FIG. 3 is a front perspective view thereof; and

FIG. 4 is a bottom plan view thereof. 

The ornamental design for an ankle zone immobilizer, as shown. 